Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956–1968". The Business History Review. 65 (4, The Automobile Industry): 897. doi:10.2307/3117267. JSTOR3117267.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956–1968". The Business History Review. 65 (4, The Automobile Industry): 897. doi:10.2307/3117267. JSTOR3117267.